The longer I've been sitting here looking at your site it occurred to me that I wouldn't know this was done by a teenager. I've been looking for awhile so obviously once I started, there's enough there of interest to keep me looking.
You have some real nice photos, but to me some are really processed. If that's what stands out, it's probably overdone because I shouldn't notice or be thinking about what did you do to that photo?? lol Lew mentioned exposure and that might be where you're off and needing to post process more to compensate.
Of course I'm a longtime film photographer so I learned to frame photos the way I want them, but even shooting digitally I do very little post most of the time. I don't want to be fixing every photo, it should need minimal adjustment most of the time. Especially if you hope someday to get your photos in major publications, there will be a high standard and high expectations. Keep working on getting proper exposures.
I agree you're seeing photos, keep thinking about what's interesting about what's in your viewfinder. Learn about composition (if you search 'elements of composition in art' it should bring up some websites that will give you resources on learning about composition).
What caught my eye was the one of the rainbow, and one of something B&W coming thru the water that made me think of Shamu - that to me is something different and a cool perspective of it. Some of your interior shots are interesting and might have been even better with a slight adjustment to your vantage point, like the one of a round sconce, it's at a bit of an odd angle, and the one of the rings - that's really cool, I like the reflection to the left but there might be a little more space than necessary and the light upper right is a distraction.
I agree with Lew about the people, there's one under Cities of a man seated out on the sidewalk that could be very poignant and make the viewer feel something, but the lines of the building are at odd angles (you maybe needed to scrunch down a little) and I would have waited and watched out of the corner of my eye til the guy in the jacket was out of your shot. It takes practice to get good at the timing and capturing a moment when there isn't much time, but waiting 1-2 seconds might have given you an even better picture. Notice your backgrounds and watch for distractions (like edges of things) that are sticking into the sides or corners of a photo and just cluttering up what's in the frame and what will be in the photo. Pets to me for the most part might be best as a personal collection more than a portfolio.
You seem to be seeing patterns a lot which is great, There's one under Film (Rivers?) in B&W and I don't even know for sure what it is (made me think of a coat rack sideways) but that's unusual and I really liked that one (went back and looked again). Also the triptych of the cactus, good use of light and shadow, maybe keep playing with that idea with other subjects.
Under Nights and Lights I like the B&W of the house and stars but the light of the house made me think of it being a movie where something's going to blast out of that house any second! lol maybe I have too much imagination, maybe keep playing with the long exposures and adjustments (the bright light of the house distracts some from the lovely sky). I like the one of the long shadows of the trees on the snow (the angle seems a bit odd which might be that it's on a slope) but that's a good one. I would say in that category 'everybody' is doing car taillights, light painting of squiggles, and the moon.
Editors and curators probably see a blue zillion photos of beautiful scenery, yours will need to stand out. It'll probably take time to develop your own recognizable style. Imitating other photographers' work may be useful in learning but you don't want to go that direction if you ever submit anything. (I'm thinking of one that's beautiful light in a desert canyon but right away I thought of another photographer.) You may need to start with local or regional magazines, look at their info. on submissions; it would take time to work up to getting anything into a major publication.
I don't know if I'd separate out work on film on your site, maybe a B&W category? I'm not sure on that. I've found doing submissions to juried exhibits that unless there's a specific criteria (like plastic cameras) they don't care if the image was shot on film or digital or a Polaroid, I've had all accepted, they want good. (I've also had plenty not accepted so it takes a good bit of trying and knowing that they will only accept so many for any given exhibit). Your pricing looks a little low, I don't know where you're located and this is geared more to the US I think but maybe try
American Society of Media Photographers . Good luck and keep at it.